Northern Secondary School is a public high school in Toronto, Ontario, Canada. It teaches grades 9 through 12. It is a part of the Toronto District School Board (TDSB). Prior to Amalgamation of Toronto in 1998, it was within the Toronto Board of Education (TBE). The closest TTC subway station is Eglinton. Northern has long-standing rivalries with nearby high-school North Toronto Collegiate Institute and also with Central Technical School, Lawrence Park Collegiate Institute, York Mills Collegiate Institute, and Leaside High School.